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• hevc transcoded video not playing in safari

  9 juin 2023, par zuccy

  I transcoded a video with ffmpeg to hevc using the below command.

  


  ffmpeg -i input.mp4 -c:v libx265 -crf 23 -preset medium -x265-params keyint=60 -c:a aac -b:a 128k -f hls -hls_time 10 -hls_segment_type fmp4 -hls_playlist_type vod -tag:v hvc1  -single_file 1 playlist.m3u8


  


  ffmpeg version : 5.0.1

  


  The output is playing fine in chrome but not in safari.

  


  I found from apple support community that fmp4 should work fine in safari. I tried with different tags, presets and x265 params but I can't make it work.

  


  I want the output to be hevc hls and it should be playable in safari and chrome. Any help is really appreciated.

  


• Return Specific Values/Text in ffmpeg Result Using Python

  4 mai 2020, par jamlot

  I am attempting to write a Python script that looks for black video and silent audio in a file, and returns only the time instances when they occur.

  



  I have the following code working using the ffmpeg-python wrapper, but I can't figure out an efficient way to parse the stdout or stderror to return only the instances of black_start, black_end, black_duration, silence_start, silence_end, silence_duration.

  



  import ffmpeg 

input = ffmpeg.input(source)
video = input.video.filter('blackdetect', d=0, pix_th=0.00)
audio = input.audio.filter('silencedetect', d=0.1, n='-60dB')
out = ffmpeg.output(audio, video, 'out.null', format='null')
run = out.run_async(pipe_stdout=True, pipe_stderr=True)
result = run.communicate()

print(result)


  



  This results in the ffmpeg output, which contains the results I need. Here is the output (edited for brevity) :

  



  (b'', b"ffmpeg version 4.2.2 Copyright (c) 2000-2019 the FFmpeg developers
  built with Apple clang version 11.0.0 (clang-1100.0.33.17)
  configuration: --prefix=/usr/local/Cellar/ffmpeg/4.2.2_3 --enable-shared --enable-pthreads --enable-version3 --enable-avresample --cc=clang --host-cflags=-fno-stack-check --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libmp3lame --enable-libopus --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librtmp --enable-libspeex --enable-libsoxr --enable-videotoolbox --disable-libjack --disable-indev=jack
  libavutil      56. 31.100 / 56. 31.100
  libavcodec     58. 54.100 / 58. 54.100
  libavformat    58. 29.100 / 58. 29.100
  libavdevice    58.  8.100 / 58.  8.100
  libavfilter     7. 57.100 /  7. 57.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  5.100 /  5.  5.100
  libswresample   3.  5.100 /  3.  5.100
  libpostproc    55.  5.100 / 55.  5.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/Users/otoolej/Documents/_lab/source/black-silence-detect/AUUV71900381_test.mov':
  Metadata:
    major_brand     : qt  
    minor_version   : 537199360
    compatible_brands: qt  
    creation_time   : 2019-11-14T04:12:49.000000Z
  Duration: 00:03:50.28, start: 0.000000, bitrate: 185168 kb/s
    Stream #0:0(eng): Video: prores (HQ) (apch / 0x68637061), yuv422p10le(tv, bt709, progressive), 1920x1080, 183596 kb/s, SAR 1:1 DAR 16:9, 25 fps, 25 tbr, 25 tbn, 25 tbc (default)
    Metadata:
      creation_time   : 2019-11-14T04:12:49.000000Z
      handler_name    : Apple Video Media Handler
      encoder         : Apple ProRes 422 (HQ)
      timecode        : 00:00:00:00
    Stream #0:1(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, stereo, s16, 1536 kb/s (default)
    Metadata:
      creation_time   : 2019-11-14T04:12:49.000000Z
      handler_name    : Apple Sound Media Handler
      timecode        : 00:00:00:00
    Stream #0:2(eng): Data: none (tmcd / 0x64636D74) (default)
    Metadata:
      creation_time   : 2019-11-14T04:12:49.000000Z
      handler_name    : Time Code Media Handler
      timecode        : 00:00:00:00
Only '-vf blackdetect=d=0:pix_th=0.00' read, ignoring remaining -vf options: Use ',' to separate filters
Only '-af silencedetect=d=0.1:n=-60dB' read, ignoring remaining -af options: Use ',' to separate filters
Stream mapping:
  Stream #0:0 -> #0:0 (prores (native) -> wrapped_avframe (native))
  Stream #0:1 -> #0:1 (pcm_s16le (native) -> pcm_s16le (native))
Press [q] to stop, [?] for help
Output #0, null, to 'pipe:':
  Metadata:
    major_brand     : qt  
    minor_version   : 537199360
    compatible_brands: qt  
    encoder         : Lavf58.29.100
    Stream #0:0(eng): Video: wrapped_avframe, yuv422p(progressive), 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 200 kb/s, 25 fps, 25 tbn, 25 tbc (default)
    Metadata:
      creation_time   : 2019-11-14T04:12:49.000000Z
      handler_name    : Apple Video Media Handler
      timecode        : 00:00:00:00
      encoder         : Lavc58.54.100 wrapped_avframe
    Stream #0:1(eng): Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s (default)
    Metadata:
      creation_time   : 2019-11-14T04:12:49.000000Z
      handler_name    : Apple Sound Media Handler
      timecode        : 00:00:00:00
      encoder         : Lavc58.54.100 pcm_s16le
[silencedetect @ 0x7fdd82d011c0] silence_start: 0
frame=  112 fps=0.0 q=-0.0 size=N/A time=00:00:05.00 bitrate=N/A speed=9.96x    
[blackdetect @ 0x7fdd82e06580] black_start:0 black_end:5 black_duration:5
[silencedetect @ 0x7fdd82d011c0] silence_end: 5.06285 | silence_duration: 5.06285
frame=  211 fps=210 q=-0.0 size=N/A time=00:00:09.00 bitrate=N/A speed=8.97x    
frame=  319 fps=212 q=-0.0 size=N/A time=00:00:13.00 bitrate=N/A speed=8.63x    
frame=  427 fps=213 q=-0.0 size=N/A time=00:00:17.08 bitrate=N/A speed=8.51x    
frame=  537 fps=214 q=-0.0 size=N/A time=00:00:22.00 bitrate=N/A speed=8.77x    
frame=  650 fps=216 q=-0.0 size=N/A time=00:00:26.00 bitrate=N/A speed=8.63x    
frame=  761 fps=217 q=-0.0 size=N/A time=00:00:31.00 bitrate=N/A speed=8.82x    
frame=  874 fps=218 q=-0.0 size=N/A time=00:00:35.00 bitrate=N/A speed=8.71x    
frame=  980 fps=217 q=-0.0 size=N/A time=00:00:39.20 bitrate=N/A speed=8.67x    
...  
frame= 5680 fps=213 q=-0.0 size=N/A time=00:03:47.20 bitrate=N/A speed=8.53x    
[silencedetect @ 0x7fdd82d011c0] silence_start: 227.733
[silencedetect @ 0x7fdd82d011c0] silence_end: 229.051 | silence_duration: 1.3184
[silencedetect @ 0x7fdd82d011c0] silence_start: 229.051
[blackdetect @ 0x7fdd82e06580] black_start:229.28 black_end:230.24 black_duration:0.96
frame= 5757 fps=214 q=-0.0 Lsize=N/A time=00:03:50.28 bitrate=N/A speed=8.54x    
video:3013kB audio:43178kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
[silencedetect @ 0x7fdd82d011c0] silence_end: 230.28 | silence_duration: 1.22856
\n")


  



  What is the most efficient way to parse the output data to find/return only those result values so I can build further logic from them in my code ? In this case, I would want only the following values returned :

  



  silence_start : 0
  
silence_end : 5.06285
  
silence_duration : 5.06285

  



  black_start:0
  
black_end:5
  
black_duration:5

  



  silence_start : 227.733
  
silence_end : 229.051
  
silence_duration : 1.3184

  



  black_start:229.28
  
black_end:230.24
  
black_duration:0.96

  



  silence_start : 229.051
  
silence_end : 230.28
  
silence_duration : 1.22856

  



  I think there is a way to get only those values using ffprobe, but I couldn't get that to work within the wrapper method. Possible I would have to run ffprobe as a subprocess and parse that result somehow. That would be a total re-do though.

  


• ffmpeg recognises MXF dv but won't encode to h264

  6 août 2017, par 3pointedit

  I have a DV file encoded as an MXF that I want to transcode to h264. Running ffmpeg against the file it reads ok and understands the stream but won’t write the h264 file. It seems to get all the streams correct and I can confirm the attributes of video and audio streams.

  I just don’t understand why it won’t encode ? I tried to force a Decoder with -f dv but it complained that the source header was incorrect.

   ./ffmpeg -f dv -i camb_onitefire_050914.mov  camb_onitefire_A.mp4
  
  ffmpeg version 3.3.1 Copyright (c) 2000-2017 the FFmpeg developers
  
    built with llvm-gcc 4.2.1 (LLVM build 2336.11.00)
  
    configuration: --prefix=/Volumes/Ramdisk/sw --enable-gpl --enable-pthreads --enable-version3 --enable-libspeex --enable-libvpx --disable-decoder=libvpx --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libx264 --enable-avfilter --enable-libopencore_amrwb --enable-libopencore_amrnb --enable-filters --enable-libgsm --enable-libvidstab --enable-libx265 --disable-doc --arch=x86_64 --enable-runtime-cpudetect
  
    libavutil      55. 58.100 / 55. 58.100
  
    libavcodec     57. 89.100 / 57. 89.100
  
    libavformat    57. 71.100 / 57. 71.100
  
    libavdevice    57.  6.100 / 57.  6.100
  
    libavfilter     6. 82.100 /  6. 82.100
  
    libswscale      4.  6.100 /  4.  6.100
  
    libswresample   2.  7.100 /  2.  7.100
  
    libpostproc    54.  5.100 / 54.  5.100
  
  [dv @ 0x7fd6f4800000] Cannot find DV header.
  
  camb_onitefire_050914.mov: Operation not permitted
  
  Davids-MacBook-Pro:camb_onitefire_050914(1).vmf davidmcsween$ ./ffmpeg -i camb_onitefire_050914.mov camb_onitefire_A.mp4
  
  ffmpeg version 3.3.1 Copyright (c) 2000-2017 the FFmpeg developers
  
    built with llvm-gcc 4.2.1 (LLVM build 2336.11.00)
  
    configuration: --prefix=/Volumes/Ramdisk/sw --enable-gpl --enable-pthreads --enable-version3 --enable-libspeex --enable-libvpx --disable-decoder=libvpx --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libx264 --enable-avfilter --enable-libopencore_amrwb --enable-libopencore_amrnb --enable-filters --enable-libgsm --enable-libvidstab --enable-libx265 --disable-doc --arch=x86_64 --enable-runtime-cpudetect
  
    libavutil      55. 58.100 / 55. 58.100
  
    libavcodec     57. 89.100 / 57. 89.100
  
    libavformat    57. 71.100 / 57. 71.100
  
    libavdevice    57.  6.100 / 57.  6.100
  
    libavfilter     6. 82.100 /  6. 82.100
  
    libswscale      4.  6.100 /  4.  6.100
  
    libswresample   2.  7.100 /  2.  7.100
  
    libpostproc    54.  5.100 / 54.  5.100
  
  [mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fe1fb000000] Skipped opening external track: stream 0, alias: path='/VibrintAVFiles/P2 News Ingest/camb_onitefire_050914(1).vmf/video.vid', dir='camb_onitefire_050914(1).vmf', filename='video.vid', volume='default', nlvl_from=1, nlvl_to=1.Set enable_drefs to allow this.
  
  [mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fe1fb000000] Skipped opening external track: stream 1, alias: path='/VibrintAVFiles/P2 News Ingest/camb_onitefire_050914(1).vmf/audio_0.pcm', dir='camb_onitefire_050914(1).vmf', filename='audio_0.pcm', volume='default', nlvl_from=1, nlvl_to=1.Set enable_drefs to allow this.
  
  [mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fe1fb000000] Skipped opening external track: stream 2, alias: path='/VibrintAVFiles/P2 News Ingest/camb_onitefire_050914(1).vmf/audio_1.pcm', dir='camb_onitefire_050914(1).vmf', filename='audio_1.pcm', volume='default', nlvl_from=1, nlvl_to=1.Set enable_drefs to allow this.
  
  [mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fe1fb000000] Skipped opening external track: stream 3, alias: path='/VibrintAVFiles/P2 News Ingest/camb_onitefire_050914(1).vmf/audio_2.pcm', dir='camb_onitefire_050914(1).vmf', filename='audio_2.pcm', volume='default', nlvl_from=1, nlvl_to=1.Set enable_drefs to allow this.
  
  [mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fe1fb000000] Skipped opening external track: stream 4, alias: path='/VibrintAVFiles/P2 News Ingest/camb_onitefire_050914(1).vmf/audio_3.pcm', dir='camb_onitefire_050914(1).vmf', filename='audio_3.pcm', volume='default', nlvl_from=1, nlvl_to=1.Set enable_drefs to allow this.
  
  [mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fe1fb000000] Could not find codec parameters for stream 0 (Video: dvvideo (dvpp / 0x70707664), none, 720x576, 28800 kb/s): unspecified pixel format
  
  Consider increasing the value for the 'analyzeduration' and 'probesize' options
  
  Guessed Channel Layout for Input Stream #0.1 : mono
  
  Guessed Channel Layout for Input Stream #0.2 : mono
  
  Guessed Channel Layout for Input Stream #0.3 : mono
  
  Guessed Channel Layout for Input Stream #0.4 : mono
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'camb_onitefire_050914.mov':
  
    Metadata:
  
      creation_time   : 2014-09-04T18:54:07.000000Z
  
    Duration: 00:17:47.18, start: 0.000000, bitrate: 1 kb/s
  
      Stream #0:0(eng): Video: dvvideo (dvpp / 0x70707664), none, 720x576, 28800 kb/s, SAR 118:81 DAR 295:162, 25 fps, 25 tbr, 2500 tbn, 2500 tbc (default)
  
      Metadata:
  
        creation_time   : 2014-09-04T18:54:07.000000Z
  
        handler_name    : Apple Alias Data Handler
  
        timecode        : 01:46:43:02
  
      Stream #0:1(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, mono, s16, 768 kb/s (default)
  
      Metadata:
  
        creation_time   : 2014-09-04T18:54:07.000000Z
  
        handler_name    : Apple Alias Data Handler
  
      Stream #0:2(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, mono, s16, 768 kb/s (default)
  
      Metadata:
  
        creation_time   : 2014-09-04T18:54:07.000000Z
  
        handler_name    : Apple Alias Data Handler
  
      Stream #0:3(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, mono, s16, 768 kb/s (default)
  
      Metadata:
  
        creation_time   : 2014-09-04T18:54:07.000000Z
  
        handler_name    : Apple Alias Data Handler
  
      Stream #0:4(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, mono, s16, 768 kb/s (default)
  
      Metadata:
  
        creation_time   : 2014-09-04T18:54:07.000000Z
  
        handler_name    : Apple Alias Data Handler
  
      Stream #0:5(eng): Data: none (tmcd / 0x64636D74) (default)
  
      Metadata:
  
        creation_time   : 2014-09-04T18:54:07.000000Z
  
        handler_name    : Apple Handle Data Handler
  
        timecode        : 01:46:43:02
  
  File 'camb_onitefire_A.mp4' already exists. Overwrite ? [y/N] y
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (dvvideo (native) -> h264 (libx264))
  
    Stream #0:1 -> #0:1 (pcm_s16le (native) -> aac (native))
  
  Press [q] to stop, [?] for help
  
  Finishing stream 0:0 without any data written to it.
  
  Finishing stream 0:1 without any data written to it.
  
  Nothing was written into output file 0 (camb_onitefire_A.mp4), because at least one of its streams received no packets.
  
  frame=    0 fps=0.0 q=0.0 Lsize=       0kB time=-577014:32:22.77 bitrate=  -0.0kbits/s speed=N/A    
  
  video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
  
  [aac @ 0x7fe1fd010e00] Qavg: nan

  Heres an example of the file structure of this novel mxd :